"A tree which grows plentifully in Europe and in Siberia. It is a native of Britain, and is frequent…
Also known as Populus tremula. A medium-sized tree growing up to 10-25 meters tall.
Also known as Populus grandidentata. The branch of a Large-Tooth Aspen, native to eastern North America.
This shows the fruiting ament of Large-toothed Aspen, Populus grandidentata, (Keeler, 1915).
Also known as Populus tremuloides. A species of tree native to the cooler areas of North America.